CN206211551U - A kind of photovoltaic combining inverter - Google Patents
A kind of photovoltaic combining inverter Download PDFInfo
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- CN206211551U CN206211551U CN201621203137.8U CN201621203137U CN206211551U CN 206211551 U CN206211551 U CN 206211551U CN 201621203137 U CN201621203137 U CN 201621203137U CN 206211551 U CN206211551 U CN 206211551U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a kind of photovoltaic combining inverter, belong to power electronic equipment technical field, including exchange cabinet and power cabinet, a power cell be provided with power cabinet, it is characterised in that：Power cell includes the (PCC) power, dc circuit breaker, A.C. contactor and the LC filter circuits that set gradually from top to bottom, exchange cabinet includes the master controller, the first panel, AC circuit breaker, the second panel and the alternating current filter that set gradually from top to bottom, power cabinet, for the DC inverter that produces photovoltaic cell into alternating current；Exchange cabinet, for the alternating current of power cabinet inversion to be connected to the grid.Be integrated into dc circuit breaker in power cell by the utility model, and modularized design power cell, so that versatility and the enhancing of capacity scalability, and reasonably optimizing layout is carried out to power cell structure, making the power cell of whole photovoltaic combining inverter has a compact conformation, and space availability ratio is high and the characteristics of easy care.
Description
Technical field
The utility model is related to power electronic equipment technical field, more particularly to a kind of photovoltaic combining inverter.
Background technology
As energy crisis and the pressure of environmental protection are sharply increased, solar energy has distribution wide, pollution-free as one kind
The new energy of feature is greatly developed.Photovoltaic DC-to-AC converter as parallel network power generation one of core component, at home and abroad city
Field scale keeps rapid growth.
Market determines the demand of inverter, policy guide inverter developing direction.Although 2015 domestic grid-connected inverse
Become device adding new capacity and reach 15GW, but price continuous slide.This requires that photovoltaic DC-to-AC converter is possessing high standard performance
While can realize low cost.Due to the environment rather harsh residing for photovoltaic plant, the human cost that photovoltaic plant is safeguarded compared with
Height, this requires photovoltaic combining inverter to safeguard less, easy care；Consider from generating measuring angle, it is desirable to which photovoltaic combining inverter goes out
Can be rapidly performed by safeguarding during line failure；Consider from installing space demand angle, shared by compacter photovoltaic combining inverter
Space is smaller.At present, in the market photovoltaic combining inverter species is various, and relatively high power rate range is from 50kW to 1MW
Have, modularization, General design are used and almost do not had between each power grade cabinet body structure, and product is numerous, design, production
To technical staff or manufacture producers, all there is larger pressure with attendant.
Used as the core apparatus photovoltaic combining inverter of photovoltaic generating system, there is following lacking in product on the market mostly
Fall into：1st, photovoltaic combining inverter sets single DC power distribution cabinet, and space structure is wasted, high cost；2nd, the work(of DC-to-AC converter
The standardization of rate cellular construction is bad with versatility, causes device category more, is unfavorable for mass production；3rd, DC-to-AC converter
Scalability is poor；4th, the installation of DC-to-AC converter, maintenance are inconvenient.
Publication No. CN 205248632U, publication date is that the Chinese patent literature of on 05 18th, 2016 discloses one kind
The photovoltaic combining inverter cabinet of integrated DC power distribution cabinet, it is characterised in that：Described photovoltaic combining inverter cabinet includes that exchange is defeated
Go out grid-connection cabinet, power cabinet and direct current input power distribution cabinet；Exchange output grid-connection cabinet is located at cabinet left side, and power cabinet is located at exchange and exports
Between grid-connection cabinet and DC power distribution cabinet, DC power distribution cabinet is located at cabinet right side；The three-phase input connection work(of exchange output grid-connection cabinet
The reactor output end and the AC of power cabinet of rate cabinet, the three-phase output connection power network of exchange output grid-connection cabinet, power cabinet
DC side connection direct current is input into the DC side of power distribution cabinet；Described exchange output grid-connection cabinet is used for the alternating current of power cabinet inversion
It is connected to the grid；The DC inversion that power cabinet is used to import direct current input power distribution cabinet is alternating current.
The photovoltaic combining inverter cabinet of integrated DC power distribution cabinet disclosed in the patent document is, it is necessary to individually set up direct current input
Power distribution cabinet, causes larger space structure to waste, high cost；Power cabinet and direct current input power distribution cabinet are each independent, are not easy to expand
Exhibition capacity；The topology layout of wherein power cell is unreasonable, is not easy to the installation and maintenance of easily worn part.
Utility model content
The utility model is in order to overcome the defect of above-mentioned prior art, there is provided a kind of photovoltaic combining inverter, this practicality is new
Directly be integrated into dc circuit breaker in the power cell of power cabinet by type, and modularized design power cell so that versatility and
Capacity scalability strengthens, and structure to power cell carries out reasonably optimizing layout, makes the work(of whole photovoltaic combining inverter
Rate unit has a compact conformation, and space availability ratio is high and the characteristics of easy care.
The utility model is achieved through the following technical solutions：
A kind of photovoltaic combining inverter, including exchange cabinet and power cabinet, are provided with a power cell in power cabinet, it is special
Levy and be：The power cell includes the (PCC) power, dc circuit breaker, A.C. contactor and the LC filters that set gradually from top to bottom
Wave circuit, the dc circuit breaker is connected with (PCC) power, and (PCC) power is connected with the input of LC filter circuits, LC filtered electricals
The output end on road is connected with A.C. contactor；The exchange cabinet includes the master controller, the first distribution that set gradually from top to bottom
Plate, AC circuit breaker, the second panel and alternating current filter, the A.C. contactor are connected with alternating current filter, ac filter
Device is connected with AC circuit breaker；The power cabinet, the direct current for photovoltaic cell to be produced enters work(after dc circuit breaker
Rate component is reverse into alternating current；The exchange cabinet, for the alternating current of power cabinet inversion to be connected to the grid.
The (PCC) power, for inverse of the DC into AC, dc circuit breaker, for direct current incoming relay-protection.
The LC filter circuits, for filtering AC harmonic, A.C. contactor, for power cell to be accessed into power network.
The master controller, for receiving host computer instruction, collection DC voltage, DC current, alternating voltage, alternating current
The data of stream, AC circuit breaker and dc circuit breaker, the instruction that data and host computer according to collection are given sends driving pulse
Control power cell work, makes DC inverter be connected to the grid into alternating current, and AC circuit breaker, for exchanging output protection, is handed over
Stream wave filter, for filtering AC harmonic.
Also include uninterrupted power source, uninterrupted power source is arranged between the first panel and AC circuit breaker, uninterrupted electricity
Source, for master controller provides power supply during for external AC 220V power supply troubles.
The LC filter circuits include three-phase alternating current reactance device and ac filter electric capacity, three-phase alternating current reactance device one end every two
The ac filter electric capacity is connected between phase.
The alternating current filter is exchange EMC wave filters.
Exchange EMC wave filters described in the utility model, i.e. Electro Magnetic Compatibility wave filter, with insertion loss higher, compared with
Low leakage current；Suitable for noise and high-frequency harmonic produced by suppression electric network noise and higher harmonics and Switching Power Supply.
Operation principle of the present utility model is as follows：
During work, the direct current that photovoltaic cell is produced enters (PCC) power after dc circuit breaker, and (PCC) power is by direct current
Electricity is reverse into the pulse signal that fundamental wave is sine wave, and fundamental wave is the pulse signal of sine wave through LC filtering after inversion
Circuit filters the alternating current that harmonic wave becomes near sinusoidal, and the alternating current of the near sinusoidal enters exchange cabinet through A.C. contactor again
In alternating current filter, alternating current filter enters AC circuit breaker after filtering again, and the alternating current for finally obtaining is by alternating current interruption
Device output is connected to the grid.
The beneficial effects of the utility model are mainly manifested in following aspect：
First, the utility model, power cell includes the (PCC) power, dc circuit breaker, the exchange that set gradually from top to bottom
Contactor and LC filter circuits, dc circuit breaker are connected with (PCC) power, and (PCC) power is connected with the input of LC filter circuits,
The output end of LC filter circuits is connected with A.C. contactor；By the power cell that dc circuit breaker is directly integrated into power cabinet
In, it is separately configured for direct current input power distribution cabinet compared with prior art, power cell can be carried out modularized design, by power list
Unit concentrates and is arranged on a power cabinet the inside so that whole photovoltaic combining inverter only need to be by the power cabinet of swap modules just
Power grade can be increased, dilatation quite facilitates, and the power configuration effect of 50kW-1MW wide scopes can be reached, due to power list
Unit can carry out modularized design, and its construction standardization is good with versatility, is conducive to mass production；Exchange cabinet is included from upper
Under the master controller, the first panel, AC circuit breaker, the second panel and the alternating current filter that set gradually, A.C. contactor
It is connected with alternating current filter, alternating current filter is connected with AC circuit breaker；Power cabinet, for the direct current for producing photovoltaic cell
After dc circuit breaker alternating current is reverse into (PCC) power；Exchange cabinet, for the alternating current of power cabinet inversion to be incorporated into electricity
Net, whole scheme is carried out rationally as a complete technical scheme by by each part inside power cabinet and exchange cabinet
Optimization layout, making the power cell of whole photovoltaic combining inverter has compact conformation, the characteristics of space availability ratio is high so that absolutely
Most of easily worn part can be realized safeguarding from the front door of power cabinet, and then make whole installation and maintenance become more to facilitate, can
Scale low cost productivity effect is realized, is directly integrated into power cell by by dc circuit breaker, not only reduced whole
The volume and cost of photovoltaic combining inverter, and cause photovoltaic combining inverter have easy care, easy-maintaining, highly versatile,
Capacity scalability is strong, scale low cost the characteristics of.
2nd, the utility model, (PCC) power, for inverse of the DC into AC, by by from photovoltaic cell
DC inverter is the alternating current of sine wave into fundamental wave, is follow-up grid-connected offer alternating current；Dc circuit breaker, for direct current inlet wire
Protection, photovoltaic grid-connected inversion just can be effectively protected when direct current input occurs excessively stream by dc circuit breaker disconnection direct current
Device.
3rd, the utility model, LC filter circuits, for filtering AC harmonic, by the exchange for going out (PCC) power inversion
Most of harmonic filtration in electricity falls, and can effectively reduce influence of the harmonic wave to power network；A.C. contactor, for by power cell
Access power network, it is to avoid cause the fluctuation of line voltage, stable alternating current can be just incorporated to by electricity by A.C. contactor
Net, it is ensured that the power grid quality after grid-connected.
4th, the utility model, master controller, for receiving host computer instruction, collection DC voltage, DC current, exchange
The data of voltage, alternating current, AC circuit breaker and dc circuit breaker, the instruction hair that data and host computer according to collection are given
Go out driving pulse control power cell work, DC inverter is connected to the grid into alternating current；AC circuit breaker, it is defeated for exchanging
Go out protection, disconnecting alternating current by AC circuit breaker when exchange output occurs excessively stream can just protect photovoltaic combining inverter；
Alternating current filter, for filtering AC harmonic, by filtering noise and high-frequency harmonic that (PCC) power is produced, it is possible to increase grid-connected
The Electro Magnetic Compatibility of alternating current.
5th, the utility model, also including uninterrupted power source, uninterrupted power source is arranged on the first panel and AC circuit breaker
Between, uninterrupted power source, for master controller provides power supply during for external AC 220V power supply troubles, it is to avoid unexpected power down is to master control
Device processed causes damage, so as to ensure the job stability of whole photovoltaic combining inverter.
6th, the utility model, LC filter circuits include three-phase alternating current reactance device and ac filter electric capacity, three-phase alternating current reactance
The ac filter electric capacity is connected between the every two-phase in device one end, the higher hamonic wave in circuit can effectively be filtered, it is to avoid
The fluctuation of line voltage is caused, the quality being connected to the grid can be further ensured.
7th, the utility model, alternating current filter is exchange EMC wave filters, using specific exchange EMC wave filters, can
Electromagnetic interference is effectively eliminated, the operation of whole photovoltaic combining inverter is more stablized.
Brief description of the drawings
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments, its
In：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is structure schematic diagram of the present utility model；
Fig. 3 is electronic schematic diagram of the present utility model；
Marked in figure：1st, cabinet is exchanged, 2, power cabinet, 3, (PCC) power, 4, dc circuit breaker, 5, A.C. contactor, 6, LC
Filter circuit, 7, master controller, the 8, first panel, 9, AC circuit breaker, the 10, second panel, 11, alternating current filter, 12,
Photovoltaic cell, 13, uninterrupted power source, 14, three-phase alternating current reactance device, 15, ac filter electric capacity.
Specific embodiment
Embodiment 1
Referring to Fig. 1-Fig. 3, a kind of photovoltaic combining inverter, including exchange cabinet 1 and power cabinet 2 are provided with one in power cabinet 2
Individual power cell, the power cell includes the (PCC) power 3, the dc circuit breaker 4, A.C. contactor that set gradually from top to bottom
5 and LC filter circuits 6, the dc circuit breaker 4 is connected with (PCC) power 3, the input of (PCC) power 3 and LC filter circuits 6
Connection, the output end of LC filter circuits 6 is connected with A.C. contactor 5；The exchange cabinet 1 includes the master for setting gradually from top to bottom
Controller 7, the first panel 8, AC circuit breaker 9, the second panel 10 and alternating current filter 11, the A.C. contactor 5 with
Alternating current filter 11 is connected, and alternating current filter 11 is connected with AC circuit breaker 9；The power cabinet 2, for photovoltaic cell 12 to be produced
Raw direct current is reverse into alternating current after dc circuit breaker 4 into (PCC) power 3；The exchange cabinet 1, for by power cabinet 2
The alternating current of inversion is connected to the grid.
The present embodiment is most basic implementation method, (PCC) power that power cell includes setting gradually from top to bottom, straight
Stream breaker, A.C. contactor and LC filter circuits, dc circuit breaker are connected with (PCC) power, (PCC) power and LC filter circuits
Input connection, the output end of LC filter circuits is connected with A.C. contactor；Work(is directly integrated into by by dc circuit breaker
In the power cell of rate cabinet, it is separately configured for direct current input power distribution cabinet compared with prior art, power cell can be carried out module
Change design, by power cell concentrated setting inside a power cabinet so that whole photovoltaic combining inverter only need to be by increase and decrease
Modular power cabinet can just increase power grade, and dilatation quite facilitates, and the power that can reach 50kW-1MW wide scopes is matched somebody with somebody
Effect is put, because power cell can carry out modularized design, its construction standardization is good with versatility, is conducive to batch metaplasia
Produce；Exchange cabinet includes the master controller, the first panel, AC circuit breaker, the second panel and the friendship that set gradually from top to bottom
Stream wave filter, A.C. contactor is connected with alternating current filter, and alternating current filter is connected with AC circuit breaker；Power cabinet, for inciting somebody to action
The direct current that photovoltaic cell is produced is reverse into alternating current after dc circuit breaker into (PCC) power；Exchange cabinet, for by power
The alternating current of cabinet inversion is connected to the grid, whole scheme as a complete technical scheme, by by power cabinet and exchange cabinet
Each part of the inside carries out reasonably optimizing layout, makes the power cell of whole photovoltaic combining inverter and has compact conformation, space
The characteristics of utilization rate is high so that most easily worn parts can be realized safeguarding from the front door of power cabinet, and then make whole installation
Become more to facilitate with maintenance, be capable of achieving scale low cost productivity effect, power is directly integrated into by by dc circuit breaker
In unit, the volume and cost of whole photovoltaic combining inverter are not only reduced, and it is easy to cause that photovoltaic combining inverter has
The characteristics of maintenance, strong easy-maintaining, highly versatile, capacity scalability, scale low cost.
Embodiment 2
Referring to Fig. 1-Fig. 3, a kind of photovoltaic combining inverter, including exchange cabinet 1 and power cabinet 2 are provided with one in power cabinet 2
Individual power cell, the power cell includes the (PCC) power 3, the dc circuit breaker 4, A.C. contactor that set gradually from top to bottom
5 and LC filter circuits 6, the dc circuit breaker 4 is connected with (PCC) power 3, the input of (PCC) power 3 and LC filter circuits 6
Connection, the output end of LC filter circuits 6 is connected with A.C. contactor 5；The exchange cabinet 1 includes the master for setting gradually from top to bottom
Controller 7, the first panel 8, AC circuit breaker 9, the second panel 10 and alternating current filter 11, the A.C. contactor 5 with
Alternating current filter 11 is connected, and alternating current filter 11 is connected with AC circuit breaker 9；The power cabinet 2, for photovoltaic cell 12 to be produced
Raw direct current is reverse into alternating current after dc circuit breaker 4 into (PCC) power 3；The exchange cabinet 1, for by power cabinet 2
The alternating current of inversion is connected to the grid.
The (PCC) power 3, for inverse of the DC into AC, dc circuit breaker 4, for direct current incoming relay-protection.
The LC filter circuits 6, for filtering AC harmonic, A.C. contactor 5, for power cell to be accessed into power network.
The master controller 7, for receiving host computer instruction, collection DC voltage, DC current, alternating voltage, exchange
The data of electric current, AC circuit breaker 9 and dc circuit breaker 4, the instruction that data and host computer according to collection are given sends driving
Pulsed power cell operation, makes DC inverter be connected to the grid into alternating current, AC circuit breaker 9, is protected for exchanging output
Shield, alternating current filter 11, for filtering AC harmonic.
The present embodiment is a better embodiment, (PCC) power, for inverse of the DC into AC, by that will come from
The DC inverter of photovoltaic cell is the alternating current of sine wave into fundamental wave, is follow-up grid-connected offer alternating current；Dc circuit breaker, uses
In direct current incoming relay-protection, photovoltaic just can effectively be protected by dc circuit breaker disconnection direct current when direct current input occurs excessively stream
Combining inverter.
LC filter circuits, for filtering AC harmonic, by most of humorous in the alternating current that goes out (PCC) power inversion
Ripple is filtered out, and can effectively reduce influence of the harmonic wave to power network；A.C. contactor, for power cell to be accessed into power network, it is to avoid
The fluctuation of line voltage is caused, stable alternating current can be just connected to the grid by A.C. contactor, it is ensured that after grid-connected
Power grid quality.
Master controller, for receive host computer instruction, collection DC voltage, DC current, alternating voltage, alternating current,
The data of AC circuit breaker and dc circuit breaker, the instruction that data and host computer according to collection are given sends driving pulse control
Power cell works, and DC inverter is connected to the grid into alternating current；AC circuit breaker, for exchanging output protection, works as exchange
Disconnecting alternating current by AC circuit breaker when output occurs excessively stream can just protect photovoltaic combining inverter；Alternating current filter, uses
In AC harmonic is filtered, by filtering noise and high-frequency harmonic that (PCC) power is produced, it is possible to increase the electromagnetism of synchronization AC electricity
Compatibility.
Embodiment 3
Referring to Fig. 1-Fig. 3, a kind of photovoltaic combining inverter, including exchange cabinet 1 and power cabinet 2 are provided with one in power cabinet 2
Individual power cell, the power cell includes the (PCC) power 3, the dc circuit breaker 4, A.C. contactor that set gradually from top to bottom
5 and LC filter circuits 6, the dc circuit breaker 4 is connected with (PCC) power 3, the input of (PCC) power 3 and LC filter circuits 6
Connection, the output end of LC filter circuits 6 is connected with A.C. contactor 5；The exchange cabinet 1 includes the master for setting gradually from top to bottom
Controller 7, the first panel 8, AC circuit breaker 9, the second panel 10 and alternating current filter 11, the A.C. contactor 5 with
Alternating current filter 11 is connected, and alternating current filter 11 is connected with AC circuit breaker 9；The power cabinet 2, for photovoltaic cell 12 to be produced
Raw direct current is reverse into alternating current after dc circuit breaker 4 into (PCC) power 3；The exchange cabinet 1, for by power cabinet 2
The alternating current of inversion is connected to the grid.
The (PCC) power 3, for inverse of the DC into AC, dc circuit breaker 4, for direct current incoming relay-protection.
The LC filter circuits 6, for filtering AC harmonic, A.C. contactor 5, for power cell to be accessed into power network.
The master controller 7, for receiving host computer instruction, collection DC voltage, DC current, alternating voltage, exchange
The data of electric current, AC circuit breaker 9 and dc circuit breaker 4, the instruction that data and host computer according to collection are given sends driving
Pulsed power cell operation, makes DC inverter be connected to the grid into alternating current, AC circuit breaker 9, is protected for exchanging output
Shield, alternating current filter 11, for filtering AC harmonic.
Also include uninterrupted power source 13, uninterrupted power source 13 is arranged between the first panel 8 and AC circuit breaker 9, no
Uninterruptible power 13, for master controller 7 provides power supply during for external AC 220V power supply troubles.
The present embodiment is another better embodiment, and also including uninterrupted power source, uninterrupted power source is arranged on the first distribution
Between plate and AC circuit breaker, uninterrupted power source, for master controller provides power supply during for external AC 220V power supply troubles, it is to avoid
It is unexpected that power down cause damage to master controller, so as to ensure the job stability of whole photovoltaic combining inverter.
Embodiment 4
Referring to Fig. 1-Fig. 3, a kind of photovoltaic combining inverter, including exchange cabinet 1 and power cabinet 2 are provided with one in power cabinet 2
Individual power cell, the power cell includes the (PCC) power 3, the dc circuit breaker 4, A.C. contactor that set gradually from top to bottom
5 and LC filter circuits 6, the dc circuit breaker 4 is connected with (PCC) power 3, the input of (PCC) power 3 and LC filter circuits 6
Connection, the output end of LC filter circuits 6 is connected with A.C. contactor 5；The exchange cabinet 1 includes the master for setting gradually from top to bottom
Controller 7, the first panel 8, AC circuit breaker 9, the second panel 10 and alternating current filter 11, the A.C. contactor 5 with
Alternating current filter 11 is connected, and alternating current filter 11 is connected with AC circuit breaker 9；The power cabinet 2, for photovoltaic cell 12 to be produced
Raw direct current is reverse into alternating current after dc circuit breaker 4 into (PCC) power 3；The exchange cabinet 1, for by power cabinet 2
The alternating current of inversion is connected to the grid.
The (PCC) power 3, for inverse of the DC into AC, dc circuit breaker 4, for direct current incoming relay-protection.
The LC filter circuits 6, for filtering AC harmonic, A.C. contactor 5, for power cell to be accessed into power network.
The master controller 7, for receiving host computer instruction, collection DC voltage, DC current, alternating voltage, exchange
The data of electric current, AC circuit breaker 9 and dc circuit breaker 4, the instruction that data and host computer according to collection are given sends driving
Pulsed power cell operation, makes DC inverter be connected to the grid into alternating current, AC circuit breaker 9, is protected for exchanging output
Shield, alternating current filter 11, for filtering AC harmonic.
Also include uninterrupted power source 13, uninterrupted power source 13 is arranged between the first panel 8 and AC circuit breaker 9, no
Uninterruptible power 13, for master controller 7 provides power supply during for external AC 220V power supply troubles.
The LC filter circuits 6 include three-phase alternating current reactance device 14 and ac filter electric capacity 15, three-phase alternating current reactance device 14
The ac filter electric capacity 15 is connected between the every two-phase in one end.
The alternating current filter 11 is exchange EMC wave filters.
The present embodiment is preferred forms, and during work, the direct current that photovoltaic cell is produced enters after dc circuit breaker
DC inverter is the pulse signal of sine wave into fundamental wave by (PCC) power, (PCC) power, and fundamental wave is sine after inversion
The pulse signal of ripple filters the alternating current that harmonic wave becomes near sinusoidal through LC filter circuits, and the alternating current of the near sinusoidal is again
Enter in the alternating current filter of exchange cabinet through A.C. contactor, alternating current filter enters AC circuit breaker after filtering again, finally
The alternating current for obtaining is connected to the grid by AC circuit breaker output.
LC filter circuits include three-phase alternating current reactance device and ac filter electric capacity, three-phase alternating current reactance device one end per two-phase it
Between connect the ac filter electric capacity, the higher hamonic wave in circuit can effectively be filtered, it is to avoid cause line voltage
Fluctuation, can further ensure the quality being connected to the grid.
Alternating current filter is exchange EMC wave filters, using specific exchange EMC wave filters, can effectively eliminate electromagnetism and do
Disturb, the operation of whole photovoltaic combining inverter is more stablized.
Claims (7)
1. a kind of photovoltaic combining inverter, including exchange cabinet（1）And power cabinet（2）, power cabinet（2）Inside it is provided with a power list
Unit, it is characterised in that：The power cell includes the (PCC) power for setting gradually from top to bottom（3）, dc circuit breaker（4）, hand over
Stream contactor（5）With LC filter circuits（6）, the dc circuit breaker（4）With (PCC) power（3）Connection, (PCC) power（3）With LC
Filter circuit（6）Input connection, LC filter circuits（6）Output end and A.C. contactor（5）Connection；The exchange cabinet
（1）Including the master controller for setting gradually from top to bottom（7）, the first panel（8）, AC circuit breaker（9）, the second panel
（10）And alternating current filter（11）, the A.C. contactor（5）With alternating current filter（11）Connection, alternating current filter（11）With friendship
Stream breaker（9）Connection；The power cabinet（2）, for by photovoltaic cell（12）The direct current of generation is through dc circuit breaker（4）Afterwards
Ingoing power component（3）It is reverse into alternating current；The exchange cabinet（1）, for by power cabinet（2）The alternating current of inversion is incorporated to electricity
Net.
2. a kind of photovoltaic combining inverter according to claim 1, it is characterised in that：The (PCC) power（3）, for inciting somebody to action
DC inverter is into alternating current, dc circuit breaker（4）, for direct current incoming relay-protection.
3. a kind of photovoltaic combining inverter according to claim 1, it is characterised in that：The LC filter circuits（6）, it is used for
Filter AC harmonic, A.C. contactor（5）, for power cell to be accessed into power network.
4. a kind of photovoltaic combining inverter according to claim 1, it is characterised in that：The master controller（7）, for connecing
Receive host computer instruction, collection DC voltage, DC current, alternating voltage, alternating current, AC circuit breaker（9）And direct current interruption
Device（4）Data, data and the instruction that is given of host computer according to collection send driving pulse control power cell work, make straight
Stream electricity is reverse into alternating current and is connected to the grid, AC circuit breaker（9）, for exchanging output protection, alternating current filter（11）, for filtering
Except AC harmonic.
5. a kind of photovoltaic combining inverter according to claim 1, it is characterised in that：Also include uninterrupted power source（13）,
Uninterrupted power source（13）It is arranged on the first panel（8）And AC circuit breaker（9）Between, uninterrupted power source（13）, for outside
It is master controller during AC220V power supply troubles（7）Power supply is provided.
6. a kind of photovoltaic combining inverter according to claim 1, it is characterised in that：The LC filter circuits（6）Including
Three-phase alternating current reactance device（14）With ac filter electric capacity（15）, three-phase alternating current reactance device（14）Connection is described between the every two-phase in one end
Ac filter electric capacity（15）.
7. a kind of photovoltaic combining inverter according to claim 1 or 4, it is characterised in that：The alternating current filter（11）
It is exchange EMC wave filters.
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| CN106300432A (en) * | 2016-11-08 | 2017-01-04 | 中国东方电气集团有限公司 | A kind of Modular photovoltaic combining inverter of integrated DC distribution |
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| CN106300432A (en) * | 2016-11-08 | 2017-01-04 | 中国东方电气集团有限公司 | A kind of Modular photovoltaic combining inverter of integrated DC distribution |
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